Machine for feeding paper



Oct. 16, 1951 R PROPERZl 2,571,942

MACHINE FOR FEEDING PAPER Filed Sept. 22, 1948 2 SHEETS--SHEET l F?. 1 |I In: 4/

I MIMI INV'ENToR.

Rudolf@ Pmperz' MQW Oct. 16, 1951 R. PRoPERzl 2,571,942.

MACHINE FOR FEEDING PAPER Filed Sept. 22, 1948 2 SHEETS- SHEET 2 .as Z7 35 5 13 :l/ f 21a, 19

| i l I I:

| l I 2 INVENTOR.

Ruolooh Pro/oef'z,

BY @9PM l Patented Oct. 16, V1951 UNITED STATES PATENT OFFICE.

I Y i 2,511,942 I v l MACHINE'FOR FEEDING PAPER Rudolph Properezi, East'Rochesgter, N. Y. Application september 22, 194s, seriaiNo. 50,621

"inthe art of printing and box making etc., it

is necessary to feed sheetsof paper, cardboard,

board, etc., consecutively from a pile of such sheets.

Y Another object of the invention is to provide a machine that will adjust itself to the pile of 'sheets automatically as the pile of sheets become reduced in height.

Another object of the invention is to provide a machine that will feed the sheets either at high speedV or low speed or speeds in between as may be desired, the machine being adjustable to take care of such variations of speed as it may be desired.

These and other objects of the invention will be illustrated in the drawings, described in the specification and pointed out in the claims at the end thereof.

In the drawings: Y Figure l is a front elevation of the machine for feeding sheets of paper or cardboard from the top of a pile of such sheets.

Figure 2 is an end elevation of the machine, looking at the machine as shown in Figure 1 from the left.

Figure 3 is a section taken on the line 3x, 3x of Figure 1 looking at the machine from the left.

Figure 4 is a vertical section of the ball bearing 'through the pillow block showing the ball bearing in the pillow block under the tilting table.

In the drawings, like reference numerals indicate like parts.

In the drawings, reference numeral I indicates the base which supports the machine, 2 indicates an upright sleeve positioned on the base. In this 'sleeve slides an upright shaft 3 which can be moved up and down in the sleeve and clamped at any desired position therein by the set screw 4.

On top of the shaft 3 is an enlarged head 5, which is perforated at 5 and supports a horizontal bar 1. This bar projects to the right as shown in Figure 3 and extends over the table 8 on which the sheets of paper or cardboard are carried. This horizontal bar can be extended to the right in Figure 7 Claims-V (Cl. 271-36) 2 thirty-one inches long andl about eight inches wide and on each long edge of the table is bent a flange II and I2.

Fastened under this table I0 and adjacent-to the flanges i I and I2 are the bearing pillow blocks I3 and I4. In each of these pillow blocks is carried the outside annular or ring shaped member I5 of the ball bearing and on the bar I is carried the inside ring member I6 of the ball bearing with balls or rollers I'I between these two members. These pillow blocks are fastened to the table I0 by bolts and nuts indicated at I8. These ball or roller bearings permit the table I0 to tilt or rock easily on the bar I. In order to limit the tilting or rocking of the table I, I provide a cross bar I9` that is pivotally mounted on the shaft and is clamped to the shaft by a set screw 20. The ends of this cross bar I9 is provided with studs 2 Ia and 2 Ib which are threaded into the ends of the cross bar and are turned upward from below to a sultable extent for a purpose that will presently be described. l

On table I0 is provided an electric motor 22, a hydraulic transmission variable speed 23 and a worm gear reducing unit 2li. Each of these units has a shaft. The axes or shafts of these three units are placed in line with each other as is indicated at 25 and 26.

The electric motor 22 is stock equipment, preferably about 1/3 H. P.

The variable speed hydraulic transmission is a stock equipment of a well-known type and the particular unit in this case bears Patent No. 2,313,407.

The shaft of the electric motor ordinarily turns with a speed of 1750 R. P. M. The variable speed transmission can vary this speed from 1750 R. P. M. to 0 R. P. lVI. or increase it from 0 R. P. M. to 1750 R. P. M. That is to say, while the shaft at the right of the variable speed transmission will always turn at 1750 R. P. M. The shaft at the left of the variable speed transmission will turn at any lower angular velocity as may be deequipment and reduces the speed of the shaft at the left hand end of the hydraulic transmission by a factor of 121/2 to l and this is a Xed ratio that isv not changed and the above variations'in the speed of feeding include this factor of this Worm gear device whatever that factor may be.

By these adjustments above described the apparatus can be set to deliver eighty-four sheets per minute at the high speed. At three-quarter speed it will deliver sixty-six sheets per minute and at one-half speed it will deliver forty-six sheets per minute. At one-quarter speed it will deliver twenty-six sheets per minute and at low speed itwilldeliver one and one-half sheets per minute: These gures-are based on the feeding of sheets that are forty inches long. Sheets of one-half that length will be fed twice as fast.

Sheets of one-quarter that length Willbe fed,

four times as fast, etc'.

For the purpose of this speciicationcwe will as-Y sume that the electric motor 22, weighs: about twenty pounds and that the hydraulic transmit-- sion weighs about eighteen pounds plus.; the

weight of a quart of oil, which is the liquid used therein; and that the-worm gear weighs'about eleven Lpounds plus about one-halfpint of oil.

The three units above described areplacedon the-table liwith referenceytothefcenter-of the bar--l'so that Vwhen the table is in horizontal position the left hand end of the table or the end ofthe table that carries the feed wheels is out of vbalance to the extent that it has the downward thrust of about eight ounces. In this position the feed wheelsare about 3%" above the table. Whentheleft hand end of the table l0 inclinesl downwardly from the horizontal position, this downward thrust will increase partly according to the sine of the angle which the table makes inyits ythen inclinedv positionr with the position which the tablephad when it was in balance and it'will .,also increase partly because of the shifting ofthe load .over the centerofthe bar 1.

It has been found by test of a full size vapparatus, which has been, made that when or just beforethefeeding `wheels, 21 reach the stationary table 8 shown in Figure l, the left hand end of the table will weigh or have adownward thrust of'about four-and one-half pounds. When the table is half way-betweenthe horizontal position andthe position last described, the end; of the table will have a downward Athrust of about three pounds.

These weightsor pressures insure good traction by the feed wheels on` the paperand the card-board bei-ng fed.

For the purpose of more nearly Vequalizingthe balance and the unbalance of the table I0 a counter-weight 10a is provided at the right hand end of the table vand under it as shown in Figure or it can be decreased by adjustingit to thegleft l from the position shownI on thetableV I l'l` in vFigure l.

The lcenter of gravity of the assembly is above the tilting table l0 and is preferably to the left of a radial line drawn from the center of the bar 'l andup; through and perpendicular to the-table when in horizontal position.

When the center of gravity of thevassernbly -is -placedaflittle to theriehtiof:thercenter Vof the barA 1.- the table will bezin balance, but Will.not

4 necessarily be horizontal. When it is placed further to the right, the table l0 will contact with the stud 2l b and will stay put idly in that position. The stud 2lb must be adjusted to correspond.

The angle to which the table is permitted to tip is limited by the adjustment of the stud 2|a and this stud is set so that the two wheels 21 and 28 will stop feeding when only a few sheets remain'on the table 8.` The, other stud 2lb is set so thatA when the table'is tilted in the other direction, the left hand end of the table will rise a little above horizontal in which position it will stay-put. While it is in this position more sheets can be placed on the stationary table 8 and the Aoperationpof feeding the sheets can then be resumed byv tilting the table l0 down at the left.

O'n the worm gear 2l is a transverse shaft 24a on' which is carried a pulley 30 of large diameter. This drives a belt 3| which in turn drives a small pulley 32, which pulley is carried on a shaft33. This shaft is mounted-torotate,inbearings 34, 35 supported from the underside of theftable- Il). The feeding wheels 21 and 28 have rubber tires which bear on the sheets to be fed.

The `width of the stationary table 8 in this case is thirtyinches and as shown the feed wheelsare intended to feed sheets thirty inches in width. If the sheets are .narrower than thirty inches, then the feeding apparatus will be set overto the left as shown in Figures 2 and 3 so that thefeed wheels 21 and 28 will bear onthe sheets centrallythercof, which will secure proper feeding ofthe sheets.

In operation the sheets of paper or cardboard, etc. are placed ina pile on the table 8 atany desired depth. The variable speed transmission 23 is adjusted to feed the sheets of paper, etc. at thedesired speed and the table is thentlted down on the left and the feed wheels will come in contact Awith the sheets on thetop of the pile on the table 8 and will immediately begin feeding the sheets one after another until the table I0 has tilted down far enough to be arrested in its further movement bythe set screw 21a.

The table I9 can then be lifted at the left hand end, more sheets can be placed on the table and the feeding can be resumed and the operation can in this Way be carried on indefinitely.

The assembly that is carried by the bar 1 can be raised and lowered from the pedestal by hydraulic pressure or otherwise and the stationary table can be raised and lowered in like manner so that the space between the feed wheels and the /tablecan be increased or decreasedfasfmay be desired.

I claim:

1. In a machine for feeding sheets of paper, the combination of a horizontal shaft, a bearing mounted to tilt on said shaft, altable` fastened on said bearing and extending onboth sides thereof` and adapted to tilt therewith, a feed wheel mounted upon and under the table near one end. thereof, driving mechanism mounted on the table, gearing between the driving mechanism and the'feeding wheel adapted to drive the feeding wheel, the center of gravity of said table, feed wheeL. driving mechanism and gearing being located above said shaft, whereby tilting said table may position said center of gravity.v to one-side orthe other of said shaft. and stop means for holding the table in a predetermined position, when tilted in one direction with the wheel elevated. i

2.-.In apmachine-:for feedingsheetsofpaper,

the combination of a horizontal shaft, a bearing mounted to tilt on said shaft, a table fastened on said bearing and extending both ways therefrom, -a feed Wheel mounted upon and under the table near one end thereof, means for driving the feed Wheel mounted on the table, said table having a center of gravity above said shaft, and being in balance in a central position and out of balance when tilted in either direction from the central position, means for holding the table in a predetermined position when tilted to one side of said central position, and said Wheel being adapted to bear ag-ainst a stack of paper sheets by gravity when the table is tilted to the other side of said central position.

3. In a machine for feeding sheets of paper, the combination of a horizontal shaft, a bearing mounted to tilt on said shaft, a table fastened on said bearing and extending both ways therefrom, a feed Wheel mounted under the table near one end thereof, means for driving the feed Wheel mounted on the table, said table and means having a center of gravity located above said shaft and being in balance in a central position, adjustable screws on each side of said bearings and adapted to limit movement of said table When tilted to one side or the other of said balanced central position.

4. In a machine for feeding sheets of paper, the combination of a horizontal shaft, a bearing mounted to tilt on said shaft, a table fastened on said bearing andl extending on both sides thereof and adapted to tilt therewith, a feed wheel under the table near one end thereof, driving mechanism on the table, gearing between the driving mechanism and the feeding wheel adapted to drive the feeding Wheel, said table with said parts having a center of gravity above said shaft and being in balance in a central position, said table being capable of being tilted through a certain angle to one side of said central position or the other, means for limiting the tilting movement of the table at the end of either of said angular positions.

5. In a machine for feeding sheets of paper, I

ing the feed Wheel or wheels mounted on the table, said table and elements mounted thereon having a center of gravity above said shaft and being in balance in a central'position, said Wheel being adapted to bear upon a stack of paper sheets when said table is tilted to one side of said central position, whereby gravity acts to hold said wheel in feeding contact with the uppermost of said sheets.

6. In a machine for feeding sheets of paper, the combination of a horizontal shaft, a bearing mounted to tilt on said shaft, a table fastened on said bearing and extending both Ways therefrom, a feed Wheel or wheels mounted under the table near one end thereof, means for driving the feed wheel or wheels on the table, said table being in balance in a central position at or near the horizontal with the center of gravity of the table and elements thereon being located above said shaft, and means for limiting movement of the table by gravity to predetermined positions on either side of said central position.

7. In a machine for feeding sheets of paper, the combination of a shaft, a bearing mounted to tilt on said shaft, a table fastened on and above said bearing and extending both Ways therefrom, a crossbar pivotally mounted on said shaft, means for clamping the crossbar in a fixed position on said shaft at or near the horizontal, studs adjustably mounted on said crossbar, adapted to engage said table, said studs on the crossbar being adapted to limit the tilting of the table in either direction.

RUDOLPH PROPERZI.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 182,105 Covert Sept. 12, 1876 1,242,019 Moore Oct. 2, 1917 1,460,373 Finigan July 3, 1923 1,590,611 Wright June 29, 1926 2,288,149 Williams June 30, 1942 FOREIGN PATENTS Number Country Date 387,067 Germany Nov, 5, 1920 

